Year	days
2003	47.56923076923076
2004	42.24374999999999
2005	39.71666666666666
2006	38.49444444444444
2007	32.175
2008	22.27
2009	21.615
2010	21.639999999999997
2011	21.085
2012	21.842857142857145
2013	20.60952380952381
2014	19.614285714285717
2015	22.200000000000003
2016	23.30909090909091
2017	21.55909090909091
2018	20.672727272727276
2019	19.654545454545456